Type: 3-Phase Pilot Wire Current Differential Protection Relay (Solkor RF – 3xI)
Brand: Siemens Reyrolle
Model: 7PG21 Solkor RF – 3xI
Applications: Industrial power systems, distribution networks, feeders, interconnectors
Features:
Relays and CTs installed at both ends of the circuit and linked via metallic pilot wires
Proven, robust protection system ensuring long-term reliability
3 current inputs per relay, housed in E6 metal enclosures
High transient stability and fast fault detection
Low phase and earth fault settings
Minimal variation in performance with pilot wire length
Optional pilot wire supervision and 15 kV isolation
Simple installation, commissioning, and maintenance
Compatible with Solkor R and Solkor RF configurations
Remote intertripping and supervision options available
Functions:
Protection: Current differential protection via pilot wires
Supervision: Optional pilot wire supervision and overcurrent guard
Control: Optional unstabilising/intertripping modes
Compliance: IEC Standards, Solkor R/RF compatible
Mounting: Panel-mounted (E6 case)
Availability: Authorized Siemens suppliers and distributors in India and worldwide
